3 papers
hep-th2026
Running Love Numbers of Charged Black Holes
Sergio Barbosa, Sylvain Fichet, Lucas de Souza
Loops of virtual particles from the vacuum of quantum field theory (QFT) render black holes tidally deformable. We compute the static tidal response of unspinning charged black hol…
hep-th2025
Euler-Heisenberg action for fermions coupled to gauge and axial vectors: Hessian diagonalization, sector classification, and applications
Lucas Pereira de Souza
We derive the closed-form one-loop Euler--Heisenberg effective actions for Dirac fermions coupled simultaneously to classical electromagnetic vector and massive pseudo-vector backg…
hep-th2025
Gravity-Induced Photon Interactions and Infrared Consistency in any Dimensions
Pedro Bittar, Sylvain Fichet, Lucas de Souza
We compute the four-photon () operators generated by loops of charged particles of spin , , in the presence of gravity and in any spacetime dimension .…